Sewing-machine.



l. S. HNCH.

SEWING MACHINE. APPLICATION flu-:u APR. 1, i913. Y

' Patentedept. 5,1916.

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'1. S. FINCH. SEWING MACHINE.

APPLICATION FILED APR. 7. 1913- 1I.. Gu. 1l. t D.. :DU S d. e t D Du t aDI SHEETS-SHEET s,

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a au m M ATTORNEY I J. S FINCH. sEwmG MACHINE. APPLICATION FILED APR.7.191,3.,

Patented'sepf. 5, .1916.,

4 SHEETS-SHEET 4. j@ '.95 lqa 371/04 103 Jaz COMPANY, A CORPORATION OFNEW JERSEY.

snwINe-MAGHINE- To allwlwm it mayconcern: i c

lBe i 'known that I, JOHN S. FINGH, a citizen ofthe United States,residing at Bridgeport, inthe county of Faireld and State ofConnecticut,have invented certain new and useful Improvements .in Sewing- .Machines,of which the following is aspeciv iication, reference being had thereinto the f accompanying drawings.

This invention relates to improvements 1n 'sewing machines `forovercasting loose threads and thread ends by blind-stitching, as in the.finishingof buttonholes, and has l for its/object tofprovid'eanuimproved machine of this type, to which end the various ,operationsareV effected through independent 1 chains o fconnections leading directfrom themain shaftof the sewing machine'to the functional elements.

--Referringto Ythe drawings, Figure 1 is a view infront side elevationof the present construction, vthe frame or cloth-plate -and bracketarmbeing shown in section to better illustrate the arrangementI andrelative aetion of the parts .carried by and actuated' from the main ordriving shaft, the 'looptaker, its guide-bracket and driver beingomitted; Fig. 2. an underside view of-.Fig l,

`showing the frame in full lines; v3 a plan viewof .the cloth-plate andthe throat the transversely arranged movements of the needle; Fig. 5 .arear side elevation of the machine, the .frame being broken out teillustrate the mounting of the feed-dog-car* ryingbargFig. 6 a rear endelevation of Fig. 4'; Figs. 7, 8 and 9 front edge, plan and rear edgeviews, respectively, of the throat orvneedle plate and attachedlneedle-guard,-

carrying bar; Fig. lO perspective views ofthe needle-guard-carryinglever and needlel plate 'bracket detached from the throat'- l plate;Fig. lladetail view of the needlevguard-actuating,lever.; and Fig'. 12aside elevation ofthe stop cam vcarried by the tight pulley.`` 'i lReferring to the gures, the sewing machine frame comprises the clothorbed plate .1 provided at its front and rear'ends with Specicaton ofLetters Patent. Patented Sept. 5,1916. Application med April 7, 1913.serial no. 759,346.

downwardly extending plates 2 and 3, respectively, and at its front'andrear sides JOHAN s. FINCH, or :enrnenromg connncrrcur, Assreno'n 'ro THEsmeren MANUFAC- with similar' plates 4 and 5, respectively,

said plates being preferably formed integral with'thebed-plate Iand attheir lower edges provided with feet or'rests, as 6, said bedplate beingprovided with the usualbracket arm comprising the standard 7 .and armbracket 8. I

-The main or driving shaft 9 is mounted in suitable bearings, as 10,depending from beneath the bedplate,and at its rearend is provided withloose and tight pulleys, 11 n and l2, respectively, and'hand wheel; 14.k"'15 represents a *horizontallyv arranged gearlshaft mounted to rotatein suitable bearings, as' 17, and providedwith acbevel gear 16, the axisof 'said gearshaft being arranged parallel withbut Aslightly outof linewith the axis 'of said mainshaft.` The adjacent ends of the respectiveshafts `are operatively connected by avariable motion mechanismcomprising the crank 1.8"carried by the main shaft, crank 19 carried byAthe gearsshaft and variable motion link 2O for' operatively connectingsaid crank members. The present variable motion mechanism is the same asthat common to lock-stitch sew.- ing machines generally wherein thelooptaker is given buta single rotationf to 4one pomplete actuation ofVthe needle-carrying 21 represents' a .vertically arrangedlooptakerdriving`shaft provided at its upper end with a loop-takerdriver 22 and mounted to rotate in suitabley bearings formed in thebracket 23 secured by screws, as 24, to the underside 0f thebed-plate,-theshaft 21 be` ing provided with a bevel gear 25 which meshes with thegear 16, thus transmitting rotary movements from 'the main shaft y9 tothe loop-taker 26, which "latter is, provided with the usualbobbin-case27- -containing a mass of bobbin-thread ,(not shown). In thepresent construction the loop-taker 26, its guide-bracket28andthe'driverf22 are substantially the vsame in construfction andrelative action as those representedby United. States patent toWheelerand Dial, No. 328,165, dated'October 13,1885. l ,129 represents.arishaft-cra'nk formedintegral with the main shaft,'yand 30, ashaftcrank connection operatively eonnecting said f v mail! shaft withthe-crank lcarried by the needlefbar-actuating rock-shaft 62, the lat-vter being inountedin bearings and 84 formed in the depending brackets 85and from the main shaft, to said needle-bar` stitch-forming movements inthe direction of its length.

The needle-bar 40 is mounted in bearings 42 and 43 formed in the arms 44and 45, respectively, of the rocking needle-bar frame 46, which latteris fulcrumed upon an eccentric bolt 47 passing through the plate 5 andsecured by screw 48'in a bearing hub 49 forming a part of thebracket-plate 50 secured by screws, as 51, to the depending bracket 35.

represents a needle-vibrating lever fulcrumed on a stud 53 threaded intothe baseplate and at one end provided with a cam follower 54 whichtracks grooves, as 55, of a switch cam 56 carried by the main shaft, theopposite end of the lever being pivotally connected to aneedle-bar-vibrating -link 57 which in turn is pivotally connected tothe needle-bar frame 46 by a stud screw 58 threaded into the arm 44 ofthe frame 46, thus transmitting rocking movements from the main shaft tosaid frame.

59 represents a feed-cam provided Awith a groove 60 (shown in dottedlines only, Figs. 1 and 2) and secured by screws, as 61, to the mainshaft 9, and 62 a feed rock-shaft lever provided at one end with a camroller 63 which tracks the groove 60, the opposite end of saidleverlbeing secured by a pinoli screw 64 upon a feed rock-shaft 65mounted.

to oscillate on pintle l'iearings, as 66, said feed rock-shaft beingprovided with arms 67 and 68 between which is pivotally suspended thefeed-dogcarrying bar 69 provided with the feed-dog '70, the contour ofthe groove 60 being such as'to give to the feed-dog feed movements, and71 represents a feed-dog lift camsuitably secured upon the gear-shaft15, the periphery of said cam acting` on a stud 72 secured in thefeed-dog-ca'rrying bar 60 to effect vertically arranged movements ofsaid feed-dog-` thus transmitting from the main shaft' to said feed-dogfeed and feed lift movements.

-lt is to be understood that the present' feeding mechanism. comprisesthe commonly employed four-motion 4feed.

73 represents an eccentric carried by the main shaft, and 74 aneccentric connection, one end of which encireles said eccentric, itsopposite end being pivotally connected with a crank arm 75 fast on thebender-carryingbar-actuating-rock-shaft 76, which latter is annesseprovided with mounted a spiral spring 88 which at one end abutsagainst'the lower end ofthe sleeve 79, its opposite end being seatedagainst the collar 84 secured by screw 85 on the bar S0. The collar 84is provided with an extended portion 86 forked to receive the cloth?presser-carrying bar. 87 (the outer prong 88 only being shown, see Fig.4)., said forked err-r tension acting to hold the bar against accidentalaxial movement. Adjacent to the opposite end of the sleeve 7 9 there issecured upon the bar SQ, by screw 88" a second collar 89 for limitingthe sliding movements of said sleeve when acting to lift the fabric.

bender from engagement with themateri'albeing acted upon, the downwardmovement of vsaid sleeve causing the edective end of the fabric benderto come in contact with the fabric, which movement vis controlled tocompress the spring 83, thus "causing the bender to be held in contactwith the fabric until the sleeve in its upward movement again comes incontact with the collar 89, thus; transmitting oppositely arrangedvertical movements from said main shaft to said fabric-bender.

As in earlier constructions, the clothpresser-carrying bar 87, providedwith a cloth-presser 90, is mounted insuitable bearings formed in thehead 81 and normally held depressed bv a spring 91 seated upon a liftcollar 92 provided with an extended por'- tion 98. which latter, in theabsence of other means, is acted upon by the presser-barlifting lever 94to more the presser vertically.

95 represents a throat or needle plate suitably secured in thebed-plate, and at its upper side provided with a groove 96 into whichthe fabric is forced by the action of the fabric-bender when the machineis actuated to form stitches, 97 an opening for the reception of thefeed-dog, and 98 an opening for the needle-guard.

100 represents a needle-plate bracket pivoted at one end on afulcrum'pin 101 secured in the needle-plate, 'its opposite end beingsecured against accidental movement by a screw 10Q threaded into adepending portieri 103 of the needle-plate, said bracket being providedwith a needle-opening 104.

105 represents a. needle-guardscarrying bracket provided with aneedle-guard 106 and pivoted at one end upon the pin 101, a spring 107normally acting to hold said iro! bracket down upon the stop 108:forming a part of the bracket 100.

For controlling the effective action of the needle-guard 106 there isemployed a needleably secured in the bracket 23, a cam 116 carried bytheloop-taker-driving shaftV 21 acting, through the adjusting screw 113coming in Contact with the depending lug 117 of the bracket 105, to giveto said needleguard vertical movements, and the contour of said cam issuch as to cause the needleguard 106' to properly support the needle atthe time the latter is about to pierce the fabric.

Power is transmitted from the supply to the machine through suitableconnections,

and for properly controlling such transmission of power there isemployed a stop-motion mechanism comprising a vertically movable plunger118 mounted in suitable bearings formed in a f rocking frame 119pivotally suspended upon pintlescrews 12() secured in a bracket 121which, in turn, is suitably secured to the standard 7, a spring 122normally acting to hold said plunger in its depressed position. Theframe 119 has formed integral with it an arm 123, to the outer end ofwhich is pivotally attached one end of a link 124, its opposite endbeing pivotally connected with a rod 125` which passes down through thebed-plate andis at its lower end acted upon by a suitable manuallycontrolled treadle (not shown) 'to rock the frame 119 in the directionindicated by the arrow t, Fig. l., or in a direction to connect thetight. pulley 12 with the source of power, a spring 126 normally actingto hold said frame at its limit of movement inthe direction opposite'that indicated by said arrow.

127 represents a stopmotion cam 4carried by the tight pulley andprovided with an incline '128, cam `wall 129 and notch 130, in whichlatterthe lower endof the plunger is seated when the machineis at rest.The

stop-motion mechanism herein employed is' substantially the same as thatillustrated and described in United States patent tov G. S. Hill, No.541,276, dated June 18, 1895, Ato which reference may be had.

-131 represents a clothpresser-bar-actuating lever`pivoted by screw 182upon the bracket arm, and at its forward end operatively connected witha lug 133 forminga part of the lift collar 92, its opposite'end beingpivotally connectedto one vend. of a link 184 whose opposite end issecured .in like manner to the arm 128, from which it the frame 119- in'the' ,direction indicatedv by the arrow t, or in thedirectionforfstarting the machine, the 'forwardend ofthe lever 131.lwillf'be rocked downward, jthus permitting the spring91 to force thevpresser; into contact withY the fabric,and whengby theV resiliency .ofthe springv .126,.the-,f frame 119 is rocked in the opposite directiomorin the direction for arresting the action of the machine, the lever 131will be rocked inthe direction for elevating the cloth-presser, inopposition to the action of the ,spring 91.

'-135 represents the needle-thread take-up lever pivotally secured totheunderside" of the bed-plate 1 by screw 136'and actuated in the usualmanner from the take-.up cam 137 carried by the main shaft, the sewingthread being directed from the supply to the threadcheck 138,thread-tension 139 take-up guideeye 140, and through.Y the leaders, as141, and roller gulde 142 to the needle eye.v In the operation of themachine, supposing the production to be the finishing of buttonholes,the operator places the shoe vamp in which the buttonholes have beenworked upon the guide-plate 143 mounted on the frontl slide plate 144,with the loose threads lying between the successive buttonholes incontact with said last mentioned plate, and in such position ast-0 causethe threads to pass between angularly arranged guiding elements, as 145,thus insuring that the lateral ymovements' of the needle willalternately form blind stitches in the vamp at opposite sides of .saidthreads as the vamp is fed beneath the presser-foot and fabricbender.

`.of a. needle-guard, a bracketsustaining said needle-guard andlpivotally suspended be-` low the needle-plate, and operative connectionsincluding abell-crank lever 'between said bracket and said loop-takershaft to move said needle-guard'into effective relationship with theneedle at a predetermined point in its movements to form stitches.

2. In asewing machine of the character described, the combination withstitch-forming and cloth-'feeding mechanism including a loop-taker shaftprovided with 'a loopwill be obvious that when the operator rocks taker,a needle, a needle-carrying' bar and neede-pate, theiattei provided withe deteiehabe bracket having a medie-opening into which the needle passesbefore entering thel fabric, and means for forming iiends in 5 thelatter, of a needleguard, a biacket sustaining the latter pivotallysuspended below the needle-plate, `sind operative connections including:L bell-crank; lever between said bracket and the loop-taker shaft tomove.

10 said needle-guard into eieetive relationship :moesen name to thisspecification, in the presence of two subscribing witnesses.

JOHN S. FINCH.

Witnesses:

ABBIE M. DONIHEE., FRANK M. WooT'roN.

